package com.wd.attend.controller.common;

import com.google.code.kaptcha.Producer;
import com.wd.attend.domain.vo.CaptchaVo;
import com.wd.common.config.WdConfig;
import com.wd.common.constant.CacheConstants;
import com.wd.common.constant.Constants;
import com.wd.common.core.domain.HttpResponse;
import com.wd.common.utils.sign.Base64;
import com.wd.common.utils.uuid.IdUtils;
import com.wd.system.service.ISysConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

import static com.wd.framework.web.service.SysLoginService.verifyKeyMap;

/**
 * @className: CaptchaController
 * @description: TODO 类描述
 * @author: liumingkun
 * @date: 2023/11/2
 **/
@RestController
public class CaptchaController {

    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Autowired
    private ISysConfigService configService;

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public HttpResponse getCode(HttpServletResponse response) throws IOException {
        CaptchaVo captchaVo = new CaptchaVo();
        boolean captchaEnabled = configService.selectCaptchaEnabled();
        captchaVo.setCaptchaEnabled(captchaEnabled);
        HttpResponse httpResponse = HttpResponse.successData(captchaVo);
        if (!captchaEnabled) {
            return httpResponse;
        }

        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();
        String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;

        String capStr = null, code = null;
        BufferedImage image = null;

        // 生成验证码
        String captchaType = WdConfig.getCaptchaType();
        if ("math".equals(captchaType)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        } else if ("char".equals(captchaType)) {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }

        verifyKeyMap.put(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            return HttpResponse.error(e.getMessage());
        }

        captchaVo.setUuid(uuid);
        captchaVo.setImg(Base64.encode(os.toByteArray()));
        return httpResponse;
    }
}